<!DOCTYPE html>
<html>
  <head>
      <meta charset = "utf-8" > 
  </head>
<body>

<form action="/cgi_bin" method = "GET">
  x: <input type="text" name ="x" value="0"><br>
  y: <input type="text" name ="y" value="1"><br>

  <br>
  <p>点击提交进行四则运算</p>
  <input type="submit" value ="计算">
</form>


</body>
</html>

